Dry-pipe valve.



PATENTED MAY 31, 1904.

P. GRINNELL. DRY PIPE VALVE.

APPLIOATION FILED SEPT. 11. 1902.

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No. 761,165. 4 Patented May 31,1904.

UNITED STATES PATENT OFFICE.

FREDERICK GRINNELL, OF NEWV BEDFORD, MASSACHUSETTS, ASSIGNOR TO GENERAL FIRE EXTINGUISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

DFlY-PIPE VALVE.

SPECIFICATION forming part Of Letters Patent NO. 761,165, dated May 31,1904.

Application filed September 11, 1902- Serial No. 122,985.. (No model.)

TO all whom it y Con/067%! constitutes the intermediate chamber, which Be it known that I, FREDERICK GRINNELL, is normally open to the atmosphere through 5 of New Bedford, in the county of Bristol and a drip-pipe d in the usual manner. State of Massachusetts, have invented certain The valve-casing A is arranged so that the new and useful Improvements inDry-Pipe waterwaytherethrough extendsinahorizontal Valves; and Ido hereby declare the following direction, and said casing is provided on its specification, takenin connection with the aclower side with an extension or enlargement '55 companying drawings, forming a part of the to form a chamber or pocket E of suitable same, to be a full, clear, and exact description size to receive the valve B. s

. 1 With the construction and arrangement of The invention relates to dry-pipe valves for parts above described, where the valve B is automatic sprinkler systems, in which awatersetin position to close the waterway and the valve is held closed against the water-pressure requisite pressure is produced in the distribin the supply-pipe by means of a lighter presuting-pipes, the valve will be clamped be- 15 sure of air'or other fluid in the distributingtween the fixed valve-seat and the movable pipesvalve-seat and will be held in that position by The object of the present invention is to prothe pressure in the system acting upon the.

vide an arrangement whereby when the watermovable member C. When now the pressure valve is opened it will beremoved from the in the system is reduced, as by the opening of 20 waterway and so that there will be a free and a sprinkler, the valve will be unclamped and unobstructed passage for the water through will be free to fall into the chamber E, where the valve-casing. it will be removed from the waterway and so To that end the invention consists in the as to leave a free and unobstructed passage combination and arrangement of parts herethrough the valve-casing.

2 5 inafter described and claimed. Means may be provided for limiting the Referring to the drawings, Figure 1 is a movement of the valve B in opening and for vertical section of a dry-pipe valve embodyguiding the valve in its movement out of the ing my invention. Fig. 2 is a vertical section Waterway, and such means are shown in the on the line at :10, Fig. 1. drawings, the same consisting of the projec- 0 A representsthevalve-casing, adapted to be tions Z2 6 formed on opposite sides of the i connected at one end, a, with the water-supply valve and adapted to engage corresponding 1 pipe and at the other end, a, with the delivprojections 64 a formed on the inside of the l cry-pipe leading to the sprinkler system. valve-casing. The projections 60 a are pref- B is a double-seated valve adapted to seat erably extended to the bottom of the chamber 35 on one side against the fixed valve-seat and E, as shown in Fig. 1. As will be readilyunon the other side against the valve-seat 0, derstood, said projections a a will serve to formed on the movable member O. The movlimit the extent to which the valve will move 3 5 able member C is connected to the valve-caswith the movable member in opening and will ing by a yielding connection 0, which may be also serve to guide the valve in its movement 40 formed of thin metal, such as brass. In the out of the waterway.

construction shown the inner edge of the If desired, aflexible folding connection may yielding connection 0 is secured to the movbe substituted for the yielding connection 0' 9 able member 0, and its outer edge is clamped of such character as to provide for a greater between the two parts of the valve-casing, the range of movement of the movable member,

45 construction being such as to permit the if this should be found desirable. In such case movement of' the member O and the valvethe valve-casing would of course be formed so seat carried thereby. The space between the as to permit such increased movement of the fixed valve-seat Z) and the movable member movable member.

The valve-casing is provided with a large opening, closed by a cover-plate A, by the removal of which access may be had to the valve for the purpose of cleaning or reseating the same.

In addition to providing a free and unobstructed passage for the water through the valve-casing the removal of the valve from its position in the waterway also furnishes an effective means for preventing columning of the valve after it has been once opened. With the valve thus removed from position it cannot, of course, become accidentally reseated or columned.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a dry-pipe valve, the combination of a valve, a fixed seat for said valve and a movable seat for said valve between which fixed and movable seats the valve is clamped and held in position to close the waterway as long as the requisite pressure is maintained in the system, said valve being free to fall out of the waterway when the pressure in the system is reduced, substantially as described.

. 2. In a dry-pipe valve, the combination, with the valve-casing, of a valve, a fixed seat for said valve and a movable seat for said valve, between which fixed and movable seats the valve is clamped and held in position to close the waterway as long as the requisite pressure in the system is maintained, said valve being free to fall out of the waterway when the pressure in the system is reduced, and said valvecasing being provided with a chamber to receive said valve, substantially as described.

3. In a dry-pipe valve, the combination of a valve, a fixed seat for said valve, a movable member subjected to the pressure in the system, a valve-seat carried by said movable member, between which fixed and movable seats the valve is clamped and held in position to close the waterway as long as the requisite pressure is maintained in the system, said valve being released and free to fall out of the waterway when the pressure in the system is reduced, substantially as described.

4. In a dry-pipe valve, the combination of a valve, a fixed seat for said valve, a movable member subjected to the pressure in the systern, a valve-seat carried by said movable member, between which fixed and movable seats the valve is clamped as long as the requisite pressure is maintained in the system,said valve being free to fall out of the waterway when the pressure in the'system is reduced, and means for arresting the movement of the valve in opening before the movable member has reached the limit of its movement, substantially as described.

5. In a dry-pipe valve, the combination of a valve, a fixed seat for said valve, amovable seat for said valve, between which seats the valve is normally clamped and held in position to close the waterway, said valve being free to fall out of the waterway when released, and means to guide said valve in its falling movement, substantially as described.

6. In av dry-pipe valve, the combination of a valve, a fixed seat for said valve, a movable seat for said valve,-between which seats the valve is normally clamped and held in position to close the waterway, said valvebeing free to fall out of the waterway when released, means to limit the movement of said valve in opening, and means to guide said valve in its falling movement, substantially as described.

FREDERICK GRINNELL. 

